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JavaScript How to make CSS animation show on page for a set time on page reload

T

TrynaLearnJS

Coder
so I have a js loading animation with a progress bar that I want to show on page load. I put this under the JS section because I assume js is needed for this to work. If the page loads quicker than the 1s animation, then I want it to hide everything else and play the animation, then show content of the page. I built a sample loading animation for testing. Thank you!
HTML: 
<!DOCTYPE html>
<html>
    <head>
        <style>
            #container {
                height:50vw;
                width:100%;
            }
            #progress-bar-container {
                justify-self: center;
                height:30px;
                width:300px;
                border:2px solid gray;
            }
            #progress-bar {
                animation: webpage-loading 1s forwards;;
                animation-duration: 1s;
                justify-self: left;
                width:10px;
                height:30px;
                background-color:black;
            }
            
            @keyframes webpage-loading {
                0% {width:10px}
                30% {width:90px}
                45% {width:150px}
                60% {width:190px}
                75% {width:230px}
                100% {width:300px}
            }
            #progress-percentage {
                position: absolute;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                font-weight: bold;
            }
        </style>       
    </head>
    <body>
        <div id="container">
            <div id="progress-bar-container">
                <div id="progress-bar">
                </div>
            </div>
        </div>
    </body>
</html>
 
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Hey there!

Got it. Let's dive right in. Think of your page as a theater. When someone enters, the curtains (your loading animation) are the first thing they see, teasing an exciting performance (your page content).

Here's the plan:

  1. Curtains Up: At the beginning, the curtains are the star of the show, and the main act (your webpage content) is waiting behind them.
  2. Showtime: After the curtains finish their 1-second dance, it's time to check if the main act is ready. If so, curtains go up! If not, the curtains keep everyone entertained until the main act's set.
  3. Full Performance: Even if the main act is ready super early, we'll ensure the curtains dance for the whole 1-second, giving everyone the complete experience.
And now, the code that makes the magic happen:

HTML: 
<!-- Your HTML structure with the loader and content -->
<div id="loader">
    <div id="container">
        <!--... your progress bar code ...-->
    </div>
</div>
<div id="content" style="display: none;">
    Your amazing page content here!
</div>

<script>
    // Here's our JS director, ensuring everything goes smoothly:
    window.addEventListener('DOMContentLoaded', function () {
        // Let the curtains dance for at least 1 second
        setTimeout(function () {
            document.getElementById('loader').style.display = 'none';  // Hide the curtains
            document.getElementById('content').style.display = 'block';  // Reveal the main act
        }, 1000);  // That's the 1-second timer!
    });
</script>


There you have it! A mini theater experience for your users. If you run into any snags or need more backstage details, I'm here to help. Break a leg! 💪🎭
 
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